reverseProeasy

Matryoshka

duckerz

Task: reverse a chain of transformations applied by a Python bytecode program. Solution: decompile the .pyc file with uncompyle6, then apply inverse operations in reverse order (from_binary, atbash, reverse, rot13_inverse, xor, from_hex) to decrypt the encoded data.

$ ls tags/ techniques/
binary_encodingdecompilationxorrot13python_bytecodecipher_chainatbash
pyc_decompilationreverse_cipher_chaininverse_function_construction
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